Adding api to retrieve environment variables (#195)

Kudu.Contracts/Diagnostics/ProcessEnvironmentInfo.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+using Kudu.Contracts.Infrastructure;
+using Newtonsoft.Json;
+
+namespace Kudu.Contracts.Diagnostics
+{
+    public class ProcessEnvironmentInfo : Dictionary<string, string>, INamedObject
+    {
+        private readonly string _name;
+
+        public ProcessEnvironmentInfo()
+        {
+        }
+
+        public ProcessEnvironmentInfo(string name, Dictionary<string, string> values)
+            : base(values)
+        {
+            _name = name;
+        }
+
+        [JsonProperty(PropertyName = "name")]
+        string INamedObject.Name { get { return _name; } }
+    }
+}

Kudu.Services.Web/Startup.cs

@@ -678,6 +678,9 @@ public void Configure(IApplicationBuilder app,
                 routes.MapHttpProcessesRoute("one-process-module", "/{id}/modules/{baseAddress}",
                     new {controller = processControllerName, action = "GetModule"},
                     new {verb = new HttpMethodRouteConstraint("GET")});
+                routes.MapHttpProcessesRoute("all-envs", "/{id}/environments/{filter}",
+                    new { controller = processControllerName, action = "GetEnvironments" },
+                    new { verb = new HttpMethodRouteConstraint("GET") });
 
                 // Runtime
                 routes.MapHttpRouteDual("runtime", "diagnostics/runtime",

Kudu.Services/Diagnostics/LinuxProcessController.cs

@@ -1,5 +1,10 @@
+using System;
+using System.Collections;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 using System.Net;
+using Kudu.Contracts.Diagnostics;
+using Kudu.Services.Arm;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Kudu.Services.Performance
@@ -91,5 +96,16 @@ public IActionResult StopProfileAsync(int id)
             Response.StatusCode = (int)HttpStatusCode.BadRequest;
             return new JsonResult(ERRORMSG);
         }
+
+        [HttpGet]
+        public IActionResult GetEnvironments(int id, string filter)
+        {
+            var envs = System.Environment.GetEnvironmentVariables()
+                .Cast<DictionaryEntry>().ToDictionary(kvp => kvp.Key.ToString(), kvp => kvp.Value.ToString())
+                .Where(p => string.Equals("all", filter, StringComparison.OrdinalIgnoreCase) || p.Key.IndexOf(filter, StringComparison.OrdinalIgnoreCase) >= 0)
+                .ToDictionary(p => p.Key, p => p.Value);
+
+            return Ok(ArmUtils.AddEnvelopeOnArmRequest(new ProcessEnvironmentInfo(filter, envs), Request));
+        }
     }
 }